Inspection 13 Brake Fluid Level Sensor System

WARNING: This page is about a different car, the 2004 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.

SELF-DIAGNOSIS RESULT CHECK
1. Check the brake reservoir tank fluid level. If the level is low, add brake fluid.
2. Erase the self-diagnosis results and check the self-diagnosis results.
  
  Fig 1: Identifying Self-Diagnosis Results
  Courtesy of NISSAN MOTOR CO., U.S.A.
Is the above displayed in the self-diagnosis display items?
1. YES: GO TO 2.
2. NO: Inspection End
CONNECTOR INSPECTION
1. Disconnect the brake fluid level sensor connector and VDC/TCS/ABS control unit connector and check the terminal for deformation, disconnection, looseness, and so on. If there is any non-standard condition, repair or replace the terminal.
2. Securely reconnect the connectors and Re-conduct self-diagnosis.
OK or NG
1. OK: The connector terminal contact is loose, damaged, open or shorted.
2. NG: GO TO 3.
CHECK THE HARNESS BETWEEN THE BRAKE FLUID LEVEL SENSOR AND THE VDC/TCS/ABS CONTROL UNIT
1. Turn the ignition switch OFF and disconnect the brake fluid level sensor connector, VDC/TCS/ABS control unit, connectors.
  
  Fig 2: Checking VDC/TCS/ABS Control Unit-To-Brake Fluid Level Sensor Continuity
  Courtesy of NISSAN MOTOR CO., U.S.A.
2. Check the continuity between the brake fluid level sensor harness connector and the VDC/TCS/ABS control unit connector.
  
  Fig 3: Determining VDC/TCS/ABS Control Unit-To-Brake Fluid Level Sensor Continuity
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: Connect the connectors and conduct a VDC/TCS/ABS control unit self-diagnosis.
2. NG: If the open or short in harness, repair or replace the harness.